Just did a 3k mile drain.
Didn't need to, however, I wanted to do it for R&D purposes, make sure everything is holding up fine.
So far roughly 10,000 miles on the set up; all parts and installation is holding up well and doing a great job of filtering the blow by from going into the intake.
It should be "ok" to drain during every oil change interval (8k - 11k). However, every car is driven different along with the driving environment.
NOTE: Can was cleaned completely after every drain.
Video